# CVE-2021-45029: Apache ShenYu 2.4.1 Groovy Code Injection & SpEL Injection

> Attackers can execute arbitrary code remotely via Groovy or SpEL injection in Apache ShenYu, requiring an upgrade to secure the gateway.

- **Severity:** Critical 9.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 25 Jan 2022
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-gh38-x2wm-xmc8

## What is CVE-2021-45029?

CVE-2021-45029 is a critical code injection vulnerability in Apache ShenYu (incubating), published on 25 Jan 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Groovy Code Injection & SpEL Injection which lead to Remote Code Execution. This issue affected Apache ShenYu 2.4.0 and 2.4.1.

Weakness: CWE-94 (Improper Control of Generation of Code)

## Which versions are affected by CVE-2021-45029?

2 open source packages ship an affected version, including org.apache.shenyu:shenyu-common. It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `org.apache.shenyu:shenyu-common` | Maven | From 2.4.0 | 2.4.2 |
| `org.apache.shenyu:shenyu-common` | Maven | From 2.4.0 | 2.4.2 |

Products: Apache Shenyu.

## How do I fix CVE-2021-45029?

Upgrade org.apache.shenyu:shenyu-common to 2.4.2 or later.

## Is CVE-2021-45029 being exploited?

There is no known exploitation of CVE-2021-45029 in the wild and no public exploit code.

## Other vulnerabilities in Apache ShenYu (incubating)

- [CVE-2021-37580](https://insights.sbomify.com/CVE-2021-37580/): Apache ShenYu Admin bypass JWT authentication (critical 9.8)
- [CVE-2022-23944](https://insights.sbomify.com/CVE-2022-23944/): Apache ShenYu 2.4.1 Improper access control (critical 9.1)
- [CVE-2022-42735](https://insights.sbomify.com/CVE-2022-42735/): Apache ShenYu Admin ultra vires (high 8.8)
- [CVE-2022-37435](https://insights.sbomify.com/CVE-2022-37435/): Apache ShenYu Admin Improper Privilege Management (high 8.8)
- [CVE-2022-26650](https://insights.sbomify.com/CVE-2022-26650/): Apache ShenYu (incubating) Regular expression denial of service (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-45029 and fix it if it is affected.

What it is: CVE-2021-45029 is a critical code injection vulnerability in Apache ShenYu (incubating), published on 25 Jan 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2021-45029 in the wild and no public exploit code.

Affected packages and fixed versions:
- org.apache.shenyu:shenyu-common (Maven): affected from 2.4.0; fixed in 2.4.2
- org.apache.shenyu:shenyu-common (Maven): affected from 2.4.0; fixed in 2.4.2

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2021-45029/ (Markdown: https://insights.sbomify.com/CVE-2021-45029/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-45029
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-45029
- OSV: https://osv.dev/vulnerability/CVE-2021-45029

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-45029/
Summaries are generated and may contain mistakes; the official description above is the record.